On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 4
... younger , enclosed pair ( B ) . ment well , as the leaves are often drawn to one side or the other by the light . But Mr. Potter , who has had the opportunity of examining many species in a wild state , found that they were always more ...
... younger , enclosed pair ( B ) . ment well , as the leaves are often drawn to one side or the other by the light . But Mr. Potter , who has had the opportunity of examining many species in a wild state , found that they were always more ...
Pagina 5
... younger ones . A somewhat similar case is afforded by Uvaria ( figs . 105 , 106 , p . 70 ) ; and also by common Rhubarb , yl p- α FIG . 5. - MESEMBRYANTHEMUM . 1 , l , pair of leaves , connate , and sheathing in their lower half ; p ...
... younger ones . A somewhat similar case is afforded by Uvaria ( figs . 105 , 106 , p . 70 ) ; and also by common Rhubarb , yl p- α FIG . 5. - MESEMBRYANTHEMUM . 1 , l , pair of leaves , connate , and sheathing in their lower half ; p ...
Pagina 14
... younger pair of stipules ; and the rest of the space is occu- pied by the young leaf , which is conduplicate , or folded on itself down the middle , like a sheet of notepaper , and also turned back towards the base of the bud . This ...
... younger pair of stipules ; and the rest of the space is occu- pied by the young leaf , which is conduplicate , or folded on itself down the middle , like a sheet of notepaper , and also turned back towards the base of the bud . This ...
Pagina 15
... younger leaf ; C , ground plan of a bud , showing successive leaves ( 1-7 ) , with stipules ( St 5 , & c . ) time . I should gather also from his remarks that he can never have examined a bud in a very early state . Or take , again ...
... younger leaf ; C , ground plan of a bud , showing successive leaves ( 1-7 ) , with stipules ( St 5 , & c . ) time . I should gather also from his remarks that he can never have examined a bud in a very early state . Or take , again ...
Pagina 31
... younger leaf pushing out of the bud with its stipules , st " . FIG . 42. - The same showing the dorsal aspect of the connate stipules , si ' . they are reddish brown and membranous , and develop early , so that the leaves at this stage ...
... younger leaf pushing out of the bud with its stipules , st " . FIG . 42. - The same showing the dorsal aspect of the connate stipules , si ' . they are reddish brown and membranous , and develop early , so that the leaves at this stage ...
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Termeni și expresii frecvente
apex axil axillary buds axis base Beech blade brown bud is protected bud-scales Candolle completely covered concave conduplicate connate stipules cotyledons developed edges Edition Exochorda exstipulate fifth folded foliaceous fourth genera genus glabrous glands growing-point growth Guaiacum officinale hairs hairy Helianthemum Hornbeam Horse Chestnut inner instance lamina Lantana lateral buds Lathyrus Aphaca Lathyrus Nissolia leaf leaf-base leaf-blade leaf-stalk leaflets length less lobes lower membranous midrib Monocotyledons narrow node ocrea Opulus outer scales ovate pair of leaves pair of stipules pedestal persistent petiole Petteria PLANE Platanus plant Polygonum protect the bud protect the young Robinia scale fig scar sheath shoot showing side slightly Smilax sometimes species St FIG St St stalk stem stipular stipules belonging stipules fig stipules St subulate tendrils terminal bud trees triangular Tulip Tree upper Viburnum Viburnum Lantana Viburnum Opulus Whitebeam winter winter-bud Wych Elm young bud young leaves younger
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Pagina 233 - So careless of the single life, So careful of the type she seems, and will be more and more struck with wonder and admiration at the variety and beauty of the provisions by which Nature preserves these tender and precious buds from the severity of winter, and prepares with loving care and rich profusion for the bright promise of spring and the glorious pageant of summer.
Pagina 194 - ASSISTANCE IN CLIMBING There are two ways in which stipules may assist in this respect, viz. (1) by being developed into tendrils, or (2) into more or less reversed spines. The case of the tendrils of Smilax is one which has occasioned much discussion, but I agree with Tyler (24) that the embryological, together with the anatomical, characters indicate that in Smilax the tendrils are true stipules, found in connection with the sheathing petiole. In Paliurvs australis (fig.
Pagina 4 - The figure also shows how admirably the peculiar form of the leaf is adapted to their mode of growth. In many other plants also the leaves, as they develop, successively protect the younger ones. A somewhat similar case is afforded by Uvaria (figs. 105, 106, p. 70) ; and also by common Rhubarb, FIG.